ETAP PowerStation 4 - ISI Academy Eng Courses/ETab... · The DC Cable Editor contains nine ... Operation Technology, Inc. 11-8 ETAP PowerStation 4.0 . Operation Technology, Inc. ETAP

ETAP PowerStation 4.0

User Guide

Copyright 2001 Operation Technology, Inc.

All Rights Reserved This manual has copyrights by Operation Technology, Inc. All rights reserved. Under the copyright laws, this manual may not be copied, in whole or in part, without the written consent of Operation Technology, Inc. The Licensee may copy portions of this documentation only for the exclusive use of Licensee. Any reproduction shall include the copyright notice. This exception does not allow copies to be made for other persons or entities, whether or not sold. Under this law, copying includes translating into another language. Certain names and/or logos used in this document may constitute trademarks, service marks, or trade names of Operation Technology, Inc. or other entities. • Access, Excel, ODBC, SQL Server, Windows NT, Windows 2000, Windows Me, Windows

98, Windows XP, and Microsoft Word are registered trademarks of Microsoft Corporation. • AutoCad is a registered trademark of Autodesk. • Oracle is a registered trademark of Oracle Corporation. • PowerPlot is a registered trademark of Jackson & Associates. • Crystal Reports is a registered trademark of Seagate Software. • MATLAB and Simulink are registered trademarks of MathWorks • Screen shot(s) reprinted by permission from Microsoft Corporation. Operation Technology, Inc. believes that the information contained herein is accurate as of its publication date, and such information is subject to change without notice. This information is provided “as is” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, or non-infringement. Operation Technology, Inc. assumes no responsibility for errors or omissions in this publication or any other documents referenced in this publication.

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Chapter 11

DC Elements

This chapter addresses editors for DC elements. Except for the elements’ ID, bus connections, and status, all other data that appear in the editors are considered engineering properties. Each element available on the One-Line Diagram Toolbar has a customized editor.

Bus

Branches DC Cable DC Impedance DC Converter

Sources & Loads Battery DC Motor DC Static Load DC Lumped Load DC Elementary Diagram

Composites DC Composite Motor

Protective Devices DC Circuit Breaker DC Fuse DC Switch, Single-Throw DC Switch, Double-Throw

Operation Technology, Inc. 11-1 ETAP PowerStation 4.0

DC Elements DC Bus

11.1 DC Bus The properties associated with DC buses (nodes) of the electrical system can be entered in this data editor. The DC Bus Editor helps to model different types of buses in an electrical system. The data entered in the Bus Editor is used when running all types of system studies. DC Branches, batteries, converters, motors, static loads, and DC sides of chargers, UPS, and inverters can be graphically connected to any desired DC bus. From the Bus Editor, PowerStation displays all loads that are directly connected to the bus. Note that protective devices are ignored when PowerStation determines the connections to buses. A bus is defined as a point (node) where one or more branches are connected. A branch can be a cable, impedance, converter, etc. The minimum amount of data required to define a bus is the bus nominal voltage, which can be entered in the Info page of the DC Bus Editor. Buses have two types of graphical presentation, i.e., Bus or Node. You can change a bus to a node or a node to a bus at any time. This option gives you the flexibility to display the annotations of buses and nodes differently. The DC Bus Editor includes four pages of properties. • Info Page • Loading Page • Remarks Page • Comment Page

11.1.1 Info Page Within the Info page, specify the bus ID, In/Out of Service, Nominal kV, Initial/Operating Voltage (Magnitude & Angle), Diversity Factors (Maximum & Minimum), FDR Tag, and Equipment Name and Description.


DC Elements DC Bus

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each impedance branch element. The assigned IDs consist of the default ID dcZ plus an integer, starting with the number one and increasing as the number of buses increases. The default ID (dcBus) for the DC bus can be changed from the Defaults menu in the menu bar or from the Project View by entering a new name with up to 25 alphanumeric characters.

Nominal V Enter the nominal voltage of the bus in DC volts (V). This is a required input entry, which is used by PowerStation to convert the final bus voltages to the percent values for graphical display and output reports, i.e., bus Nominal V is used as the base voltage for the reported percent values. Note that the nominal voltage and actual base voltage of a bus can be different values. PowerStation calculates base voltages of buses internally.

In/Out of Service The operating condition of a bus can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service bus can be edited like an In Service bus; however, an Out of Service bus will not be included in any system studies. When Continuity Check is activated, an Out of Service bus automatically becomes dimmed in the one-line diagram. All the loads and branches that are energized solely through an Out of Service bus will also be de-energized and become dimmed.

Initial Voltage

% V Enter the initial bus voltage in percent of the bus nominal voltage. This value is used as the initial voltage for load flow studies including short-circuit and battery sizing studies. For unregulated buses which do not have any charger or UPS connected to them, the operating voltage is calculated during load flow analysis using the value entered here as a first guess or initial value. For regulated buses, which have a charger or UPS connected to them, this value is not used. Voltage defaults to 100%. If you select the Update Bus Voltage option from the DC Load Flow Study Case Editor, this value reflects the study result, i.e., it is updated with the operating voltage of the bus after you run a load flow study.

Operating Voltage After you run load flow studies, the operating voltage of the bus is displayed here. This value will not change until you run a new load flow study, i.e., the operating voltage of the bus for the last load flow run is displayed.


DC Elements DC Bus

Load Diversity Factor

Minimum & Maximum The minimum and maximum diversity factors (loading limits) of each individual bus may be specified as a percentage of the bus loading. These values are used when the Minimum or Maximum Loading option is selected from the Study Case Editor for load flow studies. When the Minimum or Maximum Loading option is used for a study, all loads directly connected to each bus will be multiplied by their diversity factors.

Equipment

FDR Tag Enter the feeder tag in this field, up to 25 alphanumeric characters.

Name Enter equipment name, up to 50 alphanumeric characters.

Description Enter equipment description, up to 100 alphanumeric characters.

11.1.2 Loading Page The Loading page is used to display the total motor and static loads directly connected to a bus for each loading category. The displayed kW indicate the algebraic sum of the operating load of all constant kVA and constant Z loads, either directly connected to the bus, or through composite networks or composite motors. These values are obtained from the actual loads connected to the bus.


DC Elements DC Bus

Total Bus Loading

Load Category The Load Categories correspond to the individual load categories of the bus.

Constant KW Total constant KW load (in kW) connected directly to the bus.

Constant R Total constant resistance (impedance) load (in KW) connected directly to the bus.

11.1.3 Remarks Page

User-Defined Info These fields allow you to keep track of additional data associated with this component. The names of the User-Defined (UD) fields can be changed from the Settings option in the Project menu in the menu bar.

UD Field 1 (Eq. Ref.) This is a number field with the default name Eq. Ref. You can change the name of this field and enter the equipment reference number or any other number here, up to five digits.


DC Elements DC Bus

UD Field 2 (Last Maint.) This is an alphanumeric field with the default name Last Maint. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.

UD Field 3 (Next Maint.) This is an alphanumeric field with the default name Next Maint. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.

UD Field 4 (Tests Req.) This is an alphanumeric field with the default name Tests Req. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.

UD Field A5 This is an alphanumeric field with the default name UD Field A5. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.



Drawing/Diagram

One-Line Enter the name or ID of a one-line drawing or diagram associated with this element, up to 50 alphanumeric characters. An example is the manufacturer diagram or specifications for this element.

Reference Enter the name or ID of a reference drawing or document for this element, up to 50 alphanumeric characters.

Manufacturer

Name Enter the manufacturer’s name for this element here, up to 25 alphanumeric characters.

Purchasing Date Enter the date of purchase for this element here, up to 8 alphanumeric characters.


DC Elements DC Bus

11.1.4 Comment Page Enter any additional data or comments regarding condition, maintenance, tests, or studies, associated with this element. This field can be up to 64kb with a default size of 4kb. To increase the size of this field, refer to the entries in the ETAPS.INI file.

When entering information in the page, use Ctrl+Enter to start a new paragraph. Standard keys such as Ctrl+X, Ctrl+C, and Ctrl+V can be used to cut, copy, and paste information.


DC Elements DC Cable

11.2 DC Cable The DC Cable Editor contains nine pages of properties. • Info Page • Impedance Page • Physical Page • Routing Page • Loading Page • Ampacity Page • Sizing Page • Remarks Page • Comment Page

11.2.1 Info Page Within the Info page, specify the cable ID, From and To bus ID, In/Out of Service, Length, Size, number of conductors per phase, and library link.

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each cable. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of cables increases. The default ID (Cable) for cables can be changed from the Defaults menu in the menu bar or from the Project View.



From and To Bus IDs for the connecting buses of a cable branch are designated as From and To buses. If a terminal of a branch (From or To) is not connected to any bus, a blank entry will be shown for bus ID. To connect or reconnect a branch to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminals of the cable to DC buses that reside in the same view where the element resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If a branch is connected to a bus through a number of protective devices, reconnection of the branch to a new bus from the editor will reconnect the last existing protective device to the new bus, as shown here where Branch X is reconnected from DCBus10 to DCBus4.

Next to the From and To bus IDs, PowerStation displays the nominal V of the buses for your convenience.

In/Out of Service The operating conditions of a cable can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service cable can be edited like an In Service cable; however, an Out of Service cable will not be included in any system studies. When Continuity Check is activated, an Out of Service cable automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service cable will also be de-energized and become dimmed. Note: the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a branch to be In Service for the Base Data and Out of Service in the Revision Data.

Connection In this section, the connection type is displayed. It has been added for future use. Currently it displays DC for all DC Cables.



Library

To select cables from the Cable Library, click on the Library button and the Cable Library Quick Pick will appear. From the Library Quick Pick select the Cable Library type and size at the same time. Note: after the selected Cable Library type, size, and parameters are transferred to the Cable Editor, the cable size can be changed directly from the Cable Editor, and the cable parameters are refreshed from the library. Therefore, the most important action is to select the correct Cable Library type from the Cable Library Quick Pick. When data are transferred from the Cable Library, PowerStation automatically converts the cable reactance to inductance.

Equipment




Units

Length Enter the length of the cable and select the unit from the list box. The units of length available are: feet, miles, meters, and kilometers. Note that every cable in the system can have a different unit.



# Per Phase Enter the number of conductors per phase, i.e. if 2-2/C cables or 4-1/C cables are used (4 conductors total), then the number of conductors per phase is equal to two (2).

11.2.2 Impedance Page

Impedance (per Conductor)

R Enter the cable resistance at the base temperature, in ohms or ohms per unit length, per conductor. This is for each cable, not the total resistance. PowerStation corrects the cable resistance for different studies based on the specified temperature limits, using the maximum temperature for DC load flow studies and minimum temperature for DC short-circuit studies.

L Enter the cable inductances, in henries or henries per unit length, per conductor. This is for each cable, not the total inductance. When cable data is recalled (substituted) from cable libraries, PowerStation automatically converts reactance to inductance based on library frequency. After this value is entered here, PowerStation will not make any adjustment to this value.



Units

Z per When you select Z per option, the cable impedance units are: R in ohms per unit length, and L is in henries per unit length. A unit length should also be specified, including a unit from the list box. Units available are: feet, miles, meters, and kilometers.

Z When you select Z option, the cable impedance units are: R in ohms and L in henries.

Cable Temperature

Base Enter the conductor base temperature (in degrees Celsius) at which the cable resistance is entered.

Minimum & Maximum Temperature Two conductor temperature limits (in degrees Celsius) may be entered for adjusting the cable resistance (R) for different studies. The first limit is the minimum operating temperature; the second limit is the maximum operating temperature. PowerStation will use the most conservative temperature limit for each study type. For example:

Temperature Limit Min. Max. Load Flow X Short-Circuit X

If this correction is not wanted, set both minimum and maximum temperature limits equal to the base temperature. PowerStation uses the following equations for temperature corrections: R’ = R ( 234.5 + Tc ) / ( 234.5 + Tb ) Copper Conductors R’ = R ( 228.1 + Tc ) / ( 228.1 + Tb ) Aluminum Conductors where: R = Resistance at base temperature Tb R’ = Resistance at operating temperature Tc Tb = Base temperature in degrees Celsius Tc = Operating temperature in degrees Celsius



11.2.3 Physical Page

Dimensions The physical properties of cables entered in this page are used only for calculating engineering data needed for cable temperature calculation (ampacity derating studies, U/G Raceway Systems). These parameters are not used for load flow or short-circuit type studies.

Rdc DC resistance of the cable in micro ohms at 25 degrees Celsius.

Cable OD Overall cable outside diameter including the sheath/armor and/or jacket in inches or centimeters.

Conductor OD Physical outside diameter of the conductor in inches or centimeters.

Insulation t Thickness of conductor insulation in mil or mm.

Sheath t Thickness of cable sheath or armor in mil or mm. This value becomes zero if the Sheath/Armor option is set to None.



Jacket t Thickness of outer cable jacket in mil or mm. Conductor Construction Conductor construction is used for determining ks and kp parameters, which are used for calculating the AC to DC resistance ratio. For DC cables, this ration is not used for temperature calculations. Several available choices of conductor construction are: ConRnd Concentric Round None Coated None Treated ConRnd-Coated Concentric Round Coated None Treated ConRnd-Treated Concentric Round None Coated Treated CmpRnd-Treated Compact Round None Coated Treated CmpSgm Compact Segmental None Coated None Treated CmpSgm-Coated Compact Segmental Coated None Treated CmpSgm-Treated Compact Segmental None Coated Treated CmpSct-Treated Compact Sector None Coated Treated Coating is tin or alloy. The term Treated implies a completed conductor, which has been subjected to a drying and impregnating process similar to that employed on paper power cables.

Shielding Choose shielded or not shielded.

Sheath/Shield End Connection Choose either the open or grounded option. The grounded option implies that the sheath and shield are grounded at more than one location.

Sheath/Armor Several choices of sheath/armor type are available.

Jacket Type Several choices of jacket type are available.



11.2.4 Routing Page The Routing page provides lists of routed raceways and available raceways. For both the routed and available raceways, the cable ID and raceway type are shown.

This is a list of raceways through which this cable is routed. When you add a raceway to this list (by using the Insert or Add buttons), the cable is placed in a container attached to the raceway without being placed in any specific conduit or location.

When you bring up the graphical editor for the underground systems, you will see the cables in a container of cables assigned to this raceway, but are not assigned to a specific conduit. This container is attached to the raceway and will disappear when it is empty. You will need to graphically move the cable from the unassigned cable container to the desired location. This is a list of all existing available raceways in this project, i.e., raceways that this cable can be routed through. Note that since you cannot route a cable twice through a raceway, this list does not include the raceways listed under Routed Raceways.



Insert: Route this cable through the selected raceway from the available raceway list, i.e., insert the selected raceway into the list of routed raceways. Add: Route this cable through the selected raceway from the available raceway list, i.e., add the selected raceway to the list of routed raceways. Unroute: Unroutes this cable from the selected raceway.

11.2.5 Loading Page The Loading page provides information regarding cable loading (amp) and other parameters, which are used in cable ampacity derating calculations (Underground Raceway System).



Transient Load Profile The load profile provides up to 20 time and current entry fields for specifying the loading pattern of the cable as a function of time.

# Time Current 1 0.0 230 2 3.5 560 3 7.3 400 4 0.0 0.0 (all data from this point are ignored since time = 0.0 )

In this example, the cable loading is changed from the steady-state (initial value) to 230 amps at time zero, to 560 amps at time 3.5 hours, and finally to 400 amps after 7.3 hours. The steady-state or initial value can either be 230 amps (value entered at the first time slot) or it can be set equal to the cable operating load. You can set the option for the initial/steady-state value from the Cable Derating Study Case Editor.

Time Units Select the time units for the load profile. Operating Load The operating load is specified in amps. This value is used for steady-state temperature calculations or as the initial value of the cable load profile for transient temperature calculations.

Load Variation

Load Factor The load factor is the ratio of average load to peak load in percent. Use the following equation to calculate the load factor: Load Factor = 100 x ( kWi x Ti ) / ( kWp x Tt ) % = 100 x E / ( kWi x Tt ) % where i = Interval of time when the load is non-zero kWi = Load at interval i Ti = Number of hours of interval i kWp = Peak load Tt = Ton + Toff Ton = Total hours when the load is on Toff = Total hours when the load is off E = Energy (kWh) consumed by load over the interval



If the cable carries load (current) at every interval, then the equation can be simplified to the percentage of time that the cable will be carrying the current: Load Factor = 100 x Ton / Tt % = 100 % ( if it carries the load for 24 hours per day )

Projection MF The Projection Multiplying Factor (MF) must be specified in percent. This value is used to indicate future load projection load reduction or growth. From the Cable Ampacity Derating Study Case Editor, you can select the option to use the projection multiplying factor for cable temperature calculations.

Sheath/Armor

Current The sheath/armor current can be specified as a percent of cable load current. This value indicates the amount of neutral or ground current that is carried by sheath or armor.

UGS Ampacity Calc Options

Fixed Current Check this box to have the current of this cable fixed for ampacity optimization/calculation in U/G Raceway Systems, i.e., ampacity calculations for both Uniform Ampacity & Uniform Temperature conditions.

Fixed Size Check this box to keep the size of this cable fixed for cable sizing calculations in U/G Raceway System.

11.2.6 Ampacity Page



Installation

Type Five raceway installation types are available to choose from. U/G Duct Bank U/G Direct Buried A/G Tray A/G Conduit Air Drop Each type uses a variety of conditions to determine its overall characteristics and determine the derated ampacity of the cable installed under the specified raceway conditions.

U/G Duct Underground duct banks encased in concrete.

RHO The thermal resistivity of the soil in degrees Celsius centimeters per Watt.

Ta Ambient temperature in degrees Celsius, i.e., the temperature of the surrounding soil for underground installations. Ambient soil temperature for the base ampacity is obtained from the library. Base ampacity for UG systems are usually given at 20 degrees Celsius. Tc Maximum allowable conductor temperature is in degrees Celsius. Conductor temperature for the base ampacity is obtained from the library. This value is usually given at 90 degrees Celsius.

Grouping Grouped cables operate at higher temperatures than isolated cables. To derate the cable ampacity, the number of rows and columns of the duct bank must be specified to determine a cable grouping adjustment factor. The cable ampacity adjustment factors are based on 7.5 inches center-to-center spacing. For more details see the IEEE Brown Book.

U/G Buried Directly buried underground ducts.

RHO The thermal resistivity of the soil is in degrees Celsius centimeters per Watt

Ta Ambient temperature is in degrees Celsius, i.e., the temperature of the surrounding soil, where the cable is installed. Ambient soil temperature for the base ampacity is obtained from the library. The value is usually specified at 20 degrees Celsius.



Tc Maximum allowable conductor temperature is in degrees Celsius. Conductor temperature for the base ampacity is obtained from the library. The value is usually specified at 90 degrees Celsius.

Grouping Grouped cables operate at higher temperatures than isolated cables. To derate the cable ampacity, the number of rows and columns of the cable locations must be specified to determine a cable grouping adjustment factor. The cable ampacity adjustment factors are based on a 7.5 inch center-to-center spacing. For more details see the IEEE Brown Book.

A/G Trays Above ground cable trays. The free air base ampacity from the libraries is used for cables installed in trays.

Ta Ambient air (atmospheric) temperature is in degrees Celsius, i.e., the temperature of the air surrounding the area where the tray is installed. Ambient air temperature for the base ampacity is obtained from the library. The value is usually specified at 40 degrees Celsius.

Tc Maximum allowable conductor temperature in degrees Celsius. Conductor temperature for the base ampacity is obtained from the library. This value is usually given at 90 degrees Celsius. Tray Specification

NEC If chosen, NEC methods of calculating derating factors for cable trays will be used. NEC does not provide ampacity derating due to bottom cover or correction of the ampacity multiplying factors due to the cumulative effects of combinations of tray covers and fire proofing. In general, cable sizes of 2/0 AWG and smaller are installed in cable trays in a randomly filled manner, with a maximum of two cables high. Base ampacity of randomly filled trays are based on installations at a uniform depth up to the maximum of 30% fill for 3 or 4-inch tray depths. The method applied here corresponds to a maximum fill condition and does not consider fill conditions exceeding the nominal depths.

ICEA If chosen, an ICEA P-54-440 method of calculating derating factors for cable trays will be used. The actual values of tray depth, width, and % fill entries will be taken into account.

Top Cover Select top cover if there is a removable top cover on the cable tray.

Bottom Cover Select bottom cover if there is a bottom cover on the cable tray, whether it is removable or solid, of more than 6 feet.



Maintained Spacing If cable spacing is maintained within the tray, then the effects of top cover, bottom cover, and fire wrap are ignored. For 3-phase cables larger than 2/0 AWG in a single layer, the arrangement requires spacing of 1/4 of the overall effective diameter of the grouped circuit.

Cumulative Effect Cumulative effect applies correction factors for combinations of barriers, fire coatings, and covers on cable trays.

Grouping In general, cable sizes of 2/0 AWG and smaller are installed in cable trays in a randomly filled manner, with a maximum of two cables high. Base ampacity of randomly filled trays is based on installations at a uniform depth up to the maximum of 30% fill for 3 or 4-inch tray depths. The method applied here corresponds to a maximum fill condition and does not consider fill conditions exceeding the nominal depths. Therefore, the actual values of tray depth, width, and % fill entries are for display only. • Height Height of cable tray specified in inches or centimeters • Depth Depth of cable tray specified in inches or centimeters • Width Width of cable tray specified in inches or centimeters • % fill The total amount of cable tray cross-sectional area used by cables placed in the tray

Fire Protection Fire protection provides optional libraries from which to choose various fire protection devices. Each of the three libraries may be selected individually to best describe the fire protection associated with the cable tray. The fire protection data is used to further derate cables based on the fire protection material specifications selected from the PowerStation library. The ampacity correction factors applied for fire protection are based on 10 CFR 50, Appendix R for Fire Wrap, Fire Stop, and Fire Coating.

Fire Coating The Fire Coating Library provides a selection of configurations. Each configuration has an ampacity correction factor (ACF) associated with it, which is applied against the base ampacity. For maintained spacing trays, if the fire retardant coating results in a reduction of the spacing between adjacent cables or groups to less than the required values, the cable shall be considered to be non-maintained spacing. On the other hand, if remaining space in a randomly filled tray is used up by cable coating and no other cable can be installed in the tray; credit may be taken for reduction in cable % fill below nominal value.



Fire Stop The Fire Stop Library provides a selection of configurations with ampacity correction factors for cables in trays routed through fire stops.

Fire Wrap The Fire Wrap Library provides a selection of configurations. Each fire barrier configuration has an ampacity correction factor (ACF) associated with it. This ACF must be applied whenever the raceway is wrapped for a length exceeding 6 feet and whenever the raceway has multiple, wrapped segments whose combined length exceeds 6 feet and which are spaced less than 10 feet apart.

A/G Conduit Above ground cable conduit

Ta Ambient air (atmospheric) temperature is in degrees Celsius. This is temperature of the air surrounding the area where the tray is to be installed. Ambient air temperature for the base ampacity is obtained from the library. The value is usually specified at 40 degrees Celsius.

Tc Maximum allowable conductor temperature is in degrees Celsius. Conductor temperature for the base ampacity is obtained from the library. The value is usually specified at 90 degrees Celsius.

Ampacity Adjustment

NEC w/o Grouping Effect (No Grouping Effect) NEC standards do not provide for grouping effects of cables, i.e., number of rows and columns. If the check box is not selected, the grouping effects of number of rows and columns will be considered.

NEC w/50% Load Diversity and NEC w/o Load Diversity The level of load diversity used in calculating correction factors can be chosen as either 50% or none.

Grouping Grouped cables operate at higher temperatures than isolated cables. To derate the cable ampacity, the number of rows and columns of conduit installed next to each other, as well as the total number of conductors per location (this conduit), can be specified to determine a cable grouping adjustment factor. # of conductors per location = (# of conductors per cable) x (# of cables per location)

Number of Conductors

Ampacity Correction Factor for 50 % Load Diversity

4 through 6 80 % 7 through 9 70 %

10 through 24 70 % 25 through 42 60 % 43 and above 50 %



Number of Conductors Ampacity Correction Factor

for No Load Diversity 4 through 6 80 % 7 through 9 70 %

10 through 20 50 % 21 through 30 45 % 31 through 40 40 % 41 through 60 35 %

Fire Protection Fire protection provides optional libraries from which to choose various fire protection methods. Each of the three libraries can be selected individually to best describe the fire protection associated with the conduit. The fire protection data is used to further derate the cable ampacities based on the fire protection material specifications selected from the PowerStation library. The ampacity correction factors applied for fire protection are based on 10 CFR 50, Appendix R for Fire Wrap, Fire Stop, and Fire Coating.

Fire Coating The Fire Coating Library provides a selection of configurations from which to choose. Each configuration has an ampacity correction factor (ACF) associated with it, which is applied against the base ampacity. Fire retardant coating is not a standard procedure for A/G conduits.

Fire Stop The Fire Stop Library provides a selection of configurations with ampacity correction factors for conduits routed through fire stops. Note: there may not be any reason to derate the cable for fire stops since typical fire stops are constructed with an expanded foam depth of 4 inches or less. This is considered to be insufficient to cause an increase in cable temperature.

Fire Wrap The Fire Wrap Library provides a selection of configurations. Each fire barrier configuration has an ampacity correction factor (ACF) associated with it which must be applied whenever the raceway is wrapped for a length exceeding 6 feet and whenever the raceway has multiple, wrapped segments whose combined length exceeds 6 feet and which are spaced less than 10 feet apart.

Air Drop Cables suspended without the use of trays or conduits. No cable grouping for airdrop cables is considered. Ta Ambient air (atmospheric) temperature. This is temperature of the air surrounding the area where the tray is to be installed in degrees Celsius. Ambient air temperature for the base ampacity is 40 degrees Celsius. For cables in direct sun, the air temperature may be increased by a typical value of 15 degrees Celsius.

Tc Maximum allowable conductor temperature in degrees Celsius. Conductor temperature for the base ampacity is 90 degrees Celsius.



Fire Protection Fire Protection provides optional libraries from which to choose various fire protection devices. Each of the three libraries can be selected individually to best describe the fire protection associated with the airdrop cables. The fire protection data is used to further derate the cable based on the fire protection specifications selected from PowerStation library. The ampacity correction factors applied for fire protection are based on 10 CFR 50, Appendix R for Fire Wrap, Fire Stop, and Fire Coating.

Fire Coating The Fire Coating Library provides a selection of configurations. Each configuration has an ampacity correction factor (ACF) associated with it, which is applied against the base ampacity.

Fire Stop The Fire Stop Library provides a selection of configurations with ampacity correction factors for cables routed through fire stops.

Fire Wrap The Fire Wrap Library provides a selection of configurations. Each fire barrier configuration has an ampacity correction factor (ACF) associated with it. The ACF must be applied whenever the cable is wrapped for a length exceeding 6 feet and whenever the raceway has multiple, wrapped segments whose combined length exceeds 6 feet and which are spaced less than 10 feet apart.

App MF The Multiplication Factor (MF) is determined by the application type selected from the drop-down list. You can modify the values of Application MF by selecting Project, Settings, and Cable Ampacity MF from the menu bar. Application MF is used to calculate the required cable ampacity (MF times operating or full load current).

Ampacity Ampacity ratings are displayed for easy comparison of base, derated, and required (I x MF) ampacities. The method used here is based on the concept of a derating factor that is applied against a base ampacity to calculate the derated ampacity. Id = F Ib

Base Ampacity (Ib) The full rated current value in amperes for the chosen cable before any derating occurs. This is the ampacity stated or specified by the manufacturer or other authoritative sources, such as NEC or ICEA. Derated Ampacity (Id) The modified base ampacity (maximum allowable current) in amperes for the chosen cable under the specified installation conditions.

Allowable PowerStation provides a user-defined field to enter the maximum allowable ampacity for one-line and raceway cables. This field is not provided for equipment cables. The maximum allowable ampacity is used in the load flow output reports to indicate the percent of cable overloading.



I x MF Current is calculated by multiplying the operating current (or the full load current for equipment cables) and the application multiplication factor (App. MF) for the specified application type. This value is displayed so it can be compared with the derated ampacity.

Overall Derating Factor (F) Adjustment or correction factor which takes into account differences in the cable’s actual installation conditions from the base conditions. This factor establishes a maximum feasible load capacity, which results in no reduction of the cable’s expected lifetime. The overall derating factor is composed of several components, as listed below: Fta = Derating factor for ambient temperature Ftc = Derating factor for maximum allowable conductor temperature Fth = Derating factor for underground soil thermal resistance Fg = Derating factor for cable grouping Fc = Derating factor for A/G tray covers Fm = Derating factor for A/G tray maintained spacing Fce = Cumulative effect factor for A/G trays Fm = Derating factor for A/G conduit (NEC & diversity factor) Ffc = Derating factor for A/G fire coating Ffs = Derating factor for A/G fire stop Ffw = Derating factor for A/G fire wrap

11.2.7 Sizing Page



Requirements You can select one or both requirements for determining the recommended size of cable.

Ampacity If ampacity is selected as one of the requirements, sizing will be based on the cable installation and ambient conditions specified in the Ampacity page.

Vd If you select Vd, PowerStation will size the cable based on the percent voltage drop value you enter here. Voltage drop is in percent of the nominal kV of the bus connected to the cable. If the nominal voltages of the From bus and To bus are different, the nominal V of the From bus is selected. The following table shows the methods used for calculating the voltage drop for different types of load currents flowing through the cable:

Load Type Calculation Method Motor Constant Power Static Load Constant Impedance Bus Constant Current Circuit Breaker Constant Current Fuse Constant Current

Result Using the selected cable type from the library, PowerStation recommends an optimal cable size along with the number of conductors per phase that meets the specified requirements. Additionally, PowerStation provides one cable size smaller than the optimal size for your selection. Note that the required ampacity and percent voltage drop are displayed for your reference.

Cable Loading

Operating Current The operating load current specified for this cable in the Loading page will be used if this option is selected.

Full Load Amps of Element The continuous current rating (rated current or FLA) of the selected element will be used for sizing requirements. For motor equipment cables, the motor ID is displayed here and the FLA of the motor is used.

Other Use this option to enter any value for the cable current.



Options

Use Available Cable Sizes Only Use only cable sizes that are flagged as Available in the Cable Library for the specified cable type (cable library header).

Use All Cable Sizes From Library Use all cable sizes that exist in the Cable Library for the specified cable type (cable library header).

Use Load Projection Multiplying Factor If you select this option, the cable load current will be multiplied by the Projection Multiplying Factor as specified for this cable in the Loading page.

Use Application Multiplying Factor (Equipment Cables) If you select this option, the cable load current will be multiplied by the Application Multiplying Factor (AMF) as specified for the motor or static load in the Cable/Vd page of the equipment.

Use Motor Service Factor (Motor Equipment Cables) If you select this option, the cable load current will be multiplied by the motor Service Factor (SF) as specified for the motor in the Nameplate page.

11.2.8 Remarks Page



User-Defined Info These fields allow you to keep track of extra data associated with this component. The names of the User-Defined (UD) fields can be changed from the Settings option in the Project menu in the Menu bar. UD Field 1 (Eq. Ref.) This is a number field with the default name Eq. Ref. You can change the name of this field and enter the equipment reference number or any other number here, up to five digits.







Drawing/Diagram



Manufacturer





11.2.9 Comment Page Enter any extra data or comments regarding condition, maintenance, tests, or studies, associated with this element. This field can be up to 64kb with a default size of 4kb. To increase the size of this field, refer to the entries in the ETAPS.INI file.

When entering information in the page, use Ctrl+Enter to start a new paragraph. Standard keys such as Ctrl+X, Ctrl+C, and Ctrl+V can be used to cut, copy, and paste information.


DC Elements DC Impedance

11.3 DC Impedance The DC Impedance Editor has three pages of information. • Info Page • Remarks Page • Comment Page

11.3.1 Info Page Within the Info page, specify the cable ID, From and To bus ID, In/Out of Service, Equipment Name and Description, and Impedance value including resistance and inductance.

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each impedance branch element. The assigned IDs consist of the default ID dcZ plus an integer, starting with the number one and increasing as the number of impedances increases. The default ID (dcZ) for the DC impedance can be changed from the Defaults menu in the menu bar or from the Project View.

In/Out of Service Operating conditions of an impedance branch can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service impedance can be edited like an In Service branch; however, an Out of Service impedance will not be included in any system studies. When Continuity Check is activated, an Out of Service branch automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service impedance will also be de-energized and become dimmed.


DC Elements DC Impedance Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set an impedance to be In Service for the Base Data and Out of Service in Revision Data.

From and To Bus IDs for the connecting buses of an impedance branch are designated as From and To buses. If a terminal of an impedance, From or To, is not connected to any bus, a blank entry will be shown for bus ID. To connect or reconnect an impedance to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminals of the impedance to DC buses that reside in the same view where the it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If an impedance is connected to a bus through a number of protective devices, reconnection of the impedance to a new bus from the editor will reconnect the last existing protective device to the new bus, as shown here where DCImp1 is reconnected from DCBus10 to DCBus4.


Equipment




Impedance Enter impedance R & L in ohms and henries.



11.3.2 Remarks Page

User-Defined Info These fields allow you to keep track of extra data associated with this component. The names of the User-Defined (UD) fields can be changed from the Settings option in the Project menu in the Menu bar.






DC Elements DC Impedance UD Field A5 This is an alphanumeric field with the default name UD Field A5. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.



Drawing/Diagram



Manufacturer





11.3.3 Comment Page

Enter any extra data or comments regarding condition, maintenance, tests, or studies, associated with this element. This field can be up to 64kb with a default size of 4kb. To increase the size of this field, refer to the entries in the ETAPS.INI file. When entering information in the page, use Ctrl+Enter to start a new paragraph. Standard keys such as Ctrl+X, Ctrl+C, and Ctrl+V can be used to cut, copy, and paste information.


DC Elements DC Converter

11.4 DC Converter The properties associated with DC converters of the electrical system can be entered in this editor. The DC converter metafiles (ANSI & IEC) are shaped to distinguish the DC input side and the DC output side.

The DC Converter Editor contains four pages of information. • Info Page • Rating Page • Remarks Page • Comment Page

11.4.1 Info Page Within the Info page, specify the DC converter ID, Input and Output bus IDs, In/Out of Service, FDR Tag, Name, Description, Data Type, and Priority.

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC converter. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of DC converters increases.


DC Elements DC Converter The default ID (dcConv) for DC converters can be changed from the Defaults menu in the menu bar or from the Project View.

Input Bus and Output Bus Bus IDs for the connecting buses of a DC converter are designated as Input and Output buses. If the input or output terminal of a DC converter is not connected to any bus, a blank entry will be shown for bus ID. To connect or reconnect a DC converter to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminals of the converter to DC buses that reside in the same view where the it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If a DC converter is connected to a bus through a number of protective devices, reconnection of the DC converter to a new bus from the editor will reconnect the last existing protective device to the new bus, as shown below where dcConv1 is reconnected from dcBus10 to dcBus4.

In/Out of Service Operating conditions of a DC converter can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC converter can be edited like an In Service DC converter; however, an Out of Service DC converter will not be included in any system studies. When Continuity Check is activated, an Out of Service DC converter automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service DC converter will also be de-energized and become dimmed. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a converter to be In Service for the Base Data and Out of Service in Revision Data.

Equipment






Data Type This field provides a convenient way to track data entry. Select one of the data types (such as estimate, typical, vendor, final, etc.) from the list box. As the data is updated, this field can be changed to reflect the source of the latest data. There are a total of ten load types and you can change their name from the Project menu under Settings and Data Type.

Priority Select the load priority of this DC converter from the list box. This field can be used for load priority, operating priority, load shedding priority, etc. Ten different priorities are provided to select from. Priorities can be changed from the Project menu under Settings and Load Priority.

11.4.2 Rating Page

Rating

kW / MW Enter the rated output power of the DC converter in kW or MW. Choose from the two options by clicking on the kW/MW button.

%Eff Enter the rated efficiency of the DC converter in percent. Efficiency cannot exceed 100%. The efficiency is the rated efficiency and is used for calculating the rated values, i.e., when you change the efficiency, the converter input full load current is recalculated.



Input

V Enter the rated input voltage of the DC converter in DC volts.

FLA The rated input full load current of the DC converter is calculated and displayed here in amperes. When you modify the input FLA, the converter efficiency is recalculated.

Output

V Enter the rated output voltage of the DC converter in DC volts.

FLA The rated output full load current of the DC converter is calculated and displayed here in amperes. When you modify FLA, the rated kW of the DC converter is changed.

Imax Enter the maximum output current of the DC converter in percentage of the output full load current. The DC converter will become constant current source when the output load current exceeds the Imax in DC load flow studies. PowerStation will use Imax as the maximum constant current output value. Imax defaults to 150%. This value is also used to determine the DC short-circuit contribution of the converter (Imax = k).

Operating Parameters

Vout Enter the regulated voltage setting of the DC converter output terminal as a percentage of the rated output voltage of the converter. This % operating voltage is used as the control (regulated) value in DC load flow studies. The DC converter will become idle if the output bus voltage is higher than the converter regulated voltage (Vregulated times output rated voltage) in DC load flow studies. Vout defaults to 100%.

SC Contribution

K Displays the short-circuit multiplication factor in percent of the output FLA. PowerStation uses this value to calculate short-circuit current contribution from the converter in DC short-circuit studies. The multiplication factor defaults to 150%.

Isc (K*FLA out) The short-circuit current contribution from the DC converter is calculated and displayed here in amperes.



11.4.3 Remarks Page











Drawing/Diagram



Manufacturer





11.4.4 Comment Page



DC Elements Battery

11.5 Battery The properties associated with batteries of the electrical system can be entered in this editor. The Battery Editor contains five pages of information. • Info Page • Rating Page • SC Page • Remarks Page • Comment Page

11.5.1 Info Page Within the Info page, specify the battery ID, connected bus ID, In/Out of Service, Equipment FDR Tag, Name, Description, Data Type, Priority, and number of Strings.


DC Elements Battery

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each battery. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of batteries increases. The default ID (Battery) for batteries can be changed from the Defaults menu in the menu bar or from the Project View.

Bus This is the ID of the connecting DC bus for the battery. If the terminal is not connected to any bus, a blank entry will be shown for the bus ID. To connect or reconnect a battery to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminal of the battery to DC buses that reside in the same view where the it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If a battery is connected to a bus through a number of protective devices, reconnection of the battery to a new bus from the editor will reconnect the last existing protective device to the new bus, as shown below, where Battery1 is reconnected from DCBus10 to DCBus4.

In/Out of Service Operating conditions of a battery can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service battery can be edited like an In Service battery; however, an Out of Service battery will not be included in any system studies. When Continuity Check is activated, an Out of Service battery automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service battery will also be de-energized and become dimmed. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a battery to be In Service for the Base Data and Out of Service in Revision Data.

Equipment




DC Elements Battery Description Enter equipment description, up to 100 alphanumeric characters.

Data Type This field provides a convenient way to track data entry. Select one of the data types (such as estimate, typical, vendor, final, etc.) from the list box. As the data is updated, this field can be changed to reflect the source of the latest data. There are a total of ten data types and you can change their name from the Project menu under Settings and Data Type.

Priority Select the load priority of this battery from the list box. This field can be used for load priority, operating priority, load shedding priority, etc. Ten different priorities are provided to select from list and you can change their name from the Project menu under Settings and Load Priority.

Quantity

# of Strings Enter the number of the battery strings. The number of strings defaults to 1.

11.5.2 Rating Page Within the Rating page, you can view battery specification (from the Battery Library) and specify the number of battery cells and battery temperature. This page displays the calculated battery rated voltage in V and total capacity in AH (Ampere Hour).


DC Elements Battery Rating

# of Cell Enter the number of battery cells.

Rated Voc The battery rated voltage (Open Circuit Voltage) is calculated and displayed here in volts.

Total Capacity The battery total capacity is calculated and displayed here in AH (Ampere Hour).

Library Click on this button to associate a battery library with this project.

Temp

Max and Min Two battery temperature limits (in degrees Celsius) may be entered to adjust the voltage source value in short-circuit studies and correction factor in battery sizing studies. The first limit is the minimum operating temperature; the second limit is the maximum operating temperature. PowerStation will use the most conservative temperature limit for each study type. For example:

Temperature Limit Min Max Short-Circuit X Battery Sizing X

11.5.3 SC Page Within the SC page, select the battery short-circuit model and open-circuit voltage source value, specify battery external impedance and grounding data, and view battery data from the Battery Library.


DC Elements Battery Short-Circuit Model

Voc Behind Battery Z When you select the Voc Behind Battery Z option, the battery is treated as a constant voltage source behind the battery resistance in DC short-circuit studies.

Constant Current When you select the Constant Current option, the battery is treated as an ideal current source in DC short-circuit studies. A constant current source means that the battery short-circuit contribution is constant regardless of the distance of the fault to the battery.

K Enter the short-circuit multiplication factor in percent. PowerStation uses this value to calculate the constant current source value in DC short-circuit studies. The multiplication factor defaults to 1000%.

Isc The constant current short-circuit value of the battery is calculated and displayed here in amperes.

External Impedance

R Enter the total battery cable and connection resistance in ohms per string.

L Enter the total battery cable and connection inductance in micro henries per string.

Voc per Cell

Rated Voc (Library) When you select the Rated V model, the battery rated voltage per cell is used as battery open-circuit voltage value per cell.

Calculated Value When you select the Calculated Value model, battery open-circuit voltage per cell is calculated based on the following formula: Voc = (0.84 + SG) + (Tmin – 25) * 0.0003 Where SG is the specific gravity of the battery and Tmin is the minimum operating temperature specified in the Rating page.

Voc The calculated battery open-circuit voltage per cell is displayed here in volts.

Grounding

Grounded Click on the Grounded check box for the battery to be grounded.


DC Elements Battery Rg Enter the battery grounding resistance in ohms. This value represents the total grounding resistance of this battery system including the cables and connections.

11.5.4 Remarks Page






DC Elements Battery UD Field 4 (Tests Req.) This is an alphanumeric field with the default name Tests Req. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.




Drawing/Diagram



Manufacturer




DC Elements Battery

11.5.5 Comment Page



DC Elements DC Motor

11.6 DC Motor The properties associated with DC motors of the electrical distribution system can be entered in this editor. The DC Motor Editor contains six pages of information. • Info Page • Rating Page • SC Page • Duty Cycle Page • Remarks Page • Comment Page

11.6.1 Info Page Within the Info page, specify the DC motor ID, connected bus ID, In/Out of Service, Equipment FDR (feeder) Tag, Name, Description, Data Type, load Priority, Configuration Status, Quantity of DC motors, and Demand Factor.



Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each motor. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of motors increases. The default ID (dcMach) for DC motors can be changed from the Defaults menu in the menu bar or from the Project View.

Bus This is the ID of the connecting bus for the DC motor. If the terminal is not connected to any bus, a blank entry will be shown for the bus ID. To connect or reconnect a DC motor to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminal of the motor to DC buses that reside in the same view where the it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If a DC motor is connected to a bus through a number of protective devices, reconnection of the DC motor to a new bus in this editor will reconnect the last existing protective device to the new bus, as shown below where DCMach1 is reconnected from DCBus10 to DCBus4.

In/Out of Service Operating conditions of a DC motor can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC motor can be edited like an In Service DC motor; however, an Out of Service DC motor will not be included in any system studies. When Continuity Check is activated, an Out of Service DC motor automatically becomes dimmed in the one-line diagram. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a branch to be In Service for the Base Data and Out of Service in Revision Data.



Configuration Select the operating status of the DC motor(s) for the selected configuration status from the list box. Options for operating status include:

• Continuous Continuously operating load • Intermittent Intermittently operating load • Spare Spare load (no short-circuit contribution)

Depending on the demand factor specified for each operating status, the actual loading of the motor is determined for load flow studies. Note that status is not a part of the motor engineering properties. For this reason, the name of the configuration status is shown, indicating the motor status under the specific configuration, i.e., you can have a different operating status under each configuration. In the following example, status of a motor is shown to be Continuous under Normal configuration and Spare under Emergency configuration.

Equipment





Priority Select the load priority of this motor from the list box. This field can be used for load priority, operating priority, load shedding priority, etc. Ten different priorities are provided to select from. Priority names can be changed from the Project menu under Settings and Load Priority.



Quantity Enter the quantity (number) of DC motors for this motor. This allows you to group identical motors together without a need for graphical presentation in the one-line diagram.

Demand Factor Modify the demand factors for Continuous, Intermittent, and Spare status in the provided entry fields. Demand factor is the amount of time the DC motor is actually operating. Demand factor affects the following calculations: Operating kW = Rated kW * % Loading * Demand Factor Demand factors for Continuous, Intermittent, and Spare status have a range from 0% to 100%. Since demand factors are a part of engineering properties, PowerStation uses the same factors for all configurations. Rating Page In this page, you can specify the motor nameplate data (ratings) and view motor loading and losses for all loading categories.



Rating

HP/kW Enter the motor output (shaft) rating in horsepower (HP) or kW. You can choose from these two options by clicking on the HP/kW button. PowerStation uses the following equation for the DC motor full load current: Full-Load Amp = HP * 0.7457 *1000/ ( V* Eff ) Rating in HP = kW *1000/ ( V* Eff ) Rating in kW where the Eff is at full load condition (100% loading).

V Enter the rated voltage of the motor in volts.

RPM Enter the motor speed in RPM (Revolutions Per Minute).

% Eff This is the efficiency of the motor. Efficiency cannot exceed 100%. The efficiency is the rated efficiency and is used for calculating the rated values, i.e., when you change the efficiency, the motor full load current and the operating load for all loading categories are recalculated.

FLA This is the rated full load current of the motor in amperes. This is the current the motor would pull from the system when it is fully loaded, i.e., when the system is operating at the rated HP (or kW), rated V, and rated efficiency. Loading This section is used to assign a percent loading to each one of the ten loading categories for this motor, i.e., each motor can be set to have a different operating loading level for each loading category. To edit the values of the percent loading, click on any one of the edit fields under the % Loading column. Note that you can select any of these loading categories when conducting DC load flow studies. To edit the loading category names, select Loading Category from the Project menu.



11.6.3 SC Page Within the SC page, specify the multiplication factor, impedance and time constant associated with short-circuit studies.

SC Parameters

K Enter the short-circuit multiplication factor in percent of the motor FLA. PowerStation uses this value to calculate the short-circuit current of the DC motor for a terminal bus fault. When you change the multiplication factor, the resistance, inductance, and short-circuit contribution are recalculated. The multiplication factor defaults to 1000%.

Isc The short-circuit current (Isc(K*FLA) contribution of the DC motor for a terminal bus fault is calculated and displayed here in amperes.

Ra’ Enter the resistance of the DC motor short-circuit impedance in ohms. When you change the resistance value, the inductance, multiplication factor and short-circuit contribution are recalculated.

La Enter the inductance of the DC motor short-circuit impedance in henries. When you change the inductance value, the time constant is recalculated.

Time Constant Enter the time constant of the DC motor. When you change the time constant value, the inductance is recalculated.


DC Elements DC Motor 11.6.4 Duty Cycle Page Within the Duty Cycle page, specify the duty cycle category and load profile for each duty cycle. PowerStation displays the load profile for random and non-random loads for viewing and printing. The data in this page are used in battery sizing studies.

Duty Cycle This section is used to specify load profile to each one of the five duty cycle categories.

Duty Cycle Category Select a duty cycle category from the list box and view the load profile for it in this page. Each load can have up to five duty cycle categories with independent load profiles. You can name the duty cycle categories from the Project menu bar.

Load Profile To add a load to the load profile,, click on either the Ins or Add button, or press the Insert key to create a row in the load profile table. Each row represents a segment of the load profile for this duty cycle. To edit the load profile, click on the button under the Active column, and this segment of load will be considered in studies. Click on the button under the Random column, and this segment of load will be treated as a random load in studies. Click on the field under the Type column and pick one of the seven types in the list box. Enter a load name, current in amperes, start time in seconds, and duration in seconds for this segment of load. After the data of a row is entered, this segment of load curve will be drawn on the Non-Random or Random window. To delete a row of data, highlight the row by clicking the number of the row, then click on the Del button or press the Delete key. Click on either the <-Print or Print-> button, and the displayed load profile curve (random and non-random loads) for the selected duty cycle will be printed out. Note that you can select any of the duty cycle categories when conducting battery sizing studies. To edit the loading category names, select Duty Cycle Category from the Project menu.


DC Elements DC Motor 11.6.5 Remarks Page







DC Elements DC Motor UD Field A5 This is an alphanumeric field with the default name UD Field A5. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.



Drawing/Diagram



Manufacturer





11.6.6 Comment Page



DC Elements DC Static Load

11.7 DC Static Load The properties associated with DC static loads of the electrical system can be entered in this editor. The DC Static Load Editor contains five pages of information. • Info Page • Rating Page • Duty Cycle Page • Remarks Page • Comment Page

11.7.1 Info Page Within the Info page, specify the ID, connected bus, In/Out of Service, Equipment FDR (feeder) Tag, Name, Description, Data Type, Load Priority, Configuration Status, Quantity, and Demand Factors for DC static loads.

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC static load. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of DC static loads increases. The default ID (dcLoad) for DC Static Loads can be changed from the Defaults menu in the menu bar or from the Project View.



Bus This is the ID of the connecting bus for the DC static load. If the terminal is not connected to any bus, a blank entry will be shown for the bus ID. To connect or reconnect a DC static load to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminal of the load to DC buses that reside in the same view where the it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If a DC static load is connected to a bus through a number of protective devices, reconnection of the DC static load to a new bus in this editor will reconnect the last existing protective device to the new bus, as shown below where DCStLoad1 is reconnected from DCBus10 to DCBus4.

In/Out of Service Operating conditions of a DC static load can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC static load can be edited like an In Service DC static load; however, an Out of Service DC static load will not be included in any system studies. When Continuity Check is activated, an Out of Service DC static load automatically becomes dimmed in the one-line diagram. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a branch to be In Service for the Base Data and Out of Service in Revision Data.

Configuration Select the operating status of the DC static load(s) for the selected configuration status from the list box. Options for operating status include: • Continuous Continuously operating load • Intermittent Intermittently operating load • Spare Spare load (no short-circuit contribution) Depending on the demand factor specified for each operating status, the actual loading of the DC static load is determined for load flow studies. Note that status is not a part of the DC static load engineering properties. For this reason, the name of the configuration status is shown, indicating the DC static load status under the specific configuration, i.e., you can have a different operating status under each configuration. In the following example, status of a DC static load is shown to be Continuous under Normal configuration and Spare under Emergency configuration.



Equipment





Priority Select the load priority of this DC static load from the list box. This field can be used for load priority, operating priority, load shedding priority, etc. Ten different priorities are provided to select from. Priority names can be changed from the Project menu under Settings and Load Priority.

Quantity Enter the quantity (number) of DC static loads. This allows you to group identical DC static loads together without a need for graphical presentation in the one-line diagram.

Demand Factor Modify the demand factors for Continuous, Intermittent, and Spare status in the provided entry fields. Demand factor is the amount of time the DC static load is actually operating. Demand factor affects the following calculations: Operating kW = Rated kW * % Loading * Demand Factor Demand factors for Continuous, Intermittent, and Spare status have a range from 0% to 100%. Since demand factors are a part of engineering properties, PowerStation uses the same factors for all configurations.



11.7.2 Rating Page In this page, you can specify the DC static load ratings, view loading, and losses for all loading categories.

Rating

kW Enter the kW rating of the static load. Click on the kW/MW button to choose either kW or MW units for entering and displaying data. PowerStation uses the following equation for the DC static load full load current: Full Load Amp = kW*1000 / V Rating in kW = MW *1000000 / V Rating in MW

V Enter the rated voltage of the DC static load in volts.

FLA The DC static load full load current is calculated and displayed here. When the full load current is changed, the rated power of the DC static load is recalculated.

Loading This section is used to assign a percent loading to each one of the ten loading categories for this DC static load, i.e., each DC static load can be set to have a different operating loading level for each loading category. To edit the values of the percent loading, click on any one of the edit fields under the % Loading column. Note that you can select any of these loading categories when conducting studies. To edit the loading category names, select Loading Category from the Project menu.



11.7.3 Duty Cycle Page Within the Duty Cycle page, specify the duty cycle category and load profile for each duty cycle. PowerStation displays the load profile for random and non-random loads for viewing and printing. The data in this page are used in battery sizing studies.

Duty Cycle This section is used to specify load profile to each one of the five duty cycle categories


Load Profile To add a load to the load profile, click on either the Ins or Add button, or press the Insert key to create a row in the load profile table. Each row represents a segment of the load profile for this duty cycle. To edit the load profile, click on the button under the Active column, and this segment of load will be considered in studies. Click on the button under the Random column, and this segment of load will be treated as a random load in studies. Click on the field under the Type column and pick one of the seven types in the list box. Enter a load name, current in amperes, start time in seconds, and duration in seconds for this segment of load. After the data of a row is entered, this segment of load curve will be drawn on the Non-Random or Random window. To delete a row of data, highlight the row by clicking the number of the row, then click on the Del button or press the Delete key. Click on either the <-Print or Print-> button, and the displayed load profile curve (random & non-random) for the selected duty cycle will be printed out. Note that you can select any of the duty cycle categories when conducting battery sizing studies. To edit the loading category names, select Duty Cycle Category from the Project menu.



11.7.4 Remarks Page











Drawing/Diagram



Manufacturer





11.7.5 Comment Page



DC Elements DC Lumped Load

11.8 DC Lumped Load The properties associated with DC lumped loads of the electrical system can be entered in this editor. The DC Lumped Load Editor contains six pages of information. • Info Page • Rating Page • SC Page • Duty Cycle Page • Remarks Page • Comment Page

11.8.1 Info Page Within the Info page, specify the ID, connected bus, In/Out of Service, Equipment FDR (feeder), Tag, Name, Description, Data Type, Load Priority, Configuration Status, as well as the Quantity and Demand Factors of DC lumped loads.

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC lumped load. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of DC lumped loads increases. The default ID (dcLump) for DC lumped loads can be changed from the Defaults menu in the menu bar or from the Project View.



Bus This is the ID of the connecting bus for the DC lumped load. If the terminal is not connected to any bus, a blank entry will be shown for the bus ID. To connect or reconnect a DC lumped load to a bus; select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminal of the lump load to DC buses that reside in the same view where the it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If a DC lumped load is connected to a bus through a number of protective devices, reconnection of the DC lumped load to a new bus in this editor will reconnect the last existing protective device to the new bus, as shown below where DCLump1 is reconnected from DCBus10 to DCBus4.

Next to the bus ID, PowerStation displays the nominal V of the bus for your convenience.

In/Out of Service Operating conditions of a DC lumped load can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC lumped load can be edited like an In Service DC lumped load; however, an Out of Service DC lumped load will not be included in any system studies. When Continuity Check is activated, an Out of Service DC lumped load automatically becomes dimmed in the one-line diagram. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a branch to be In Service for the Base Data and Out of Service in Revision Data.

Configuration Select the operating status of the DC lumped load(s) for the selected configuration status from the list box. Options for operating status include: • Continuous Continuously operating load • Intermittent Intermittently operating load • Spare Spare load (no short-circuit contribution) Depending on the demand factor specified for each operating status, the actual loading of the DC lumped load is determined for load flow studies.


DC Elements DC Lumped Load Note that status is not a part of the DC lumped load engineering properties. For this reason, the name of the configuration status is shown, indicating the DC lumped load status under the specific configuration, i.e., you can have a different operating status under each configuration. In the following example, status of a DC lumped load is shown to be Continuous under Normal configuration and Spare under Emergency configuration.

Equipment





Priority Select the load priority of this DC lumped load from the list box. This field can be used for load priority, operating priority, load shedding priority, etc. Ten different priorities are provided to select from. Priority names can be changed from the Project menu under Settings and Load Priority.

Demand Factor Modify the demand factors for Continuous, Intermittent, and Spare status in the provided entry fields. Demand factor is the amount of time the DC lumped load is actually operating. Demand factor affects the following calculations: Operating kW = Rated kW * % Loading * Demand Factor Demand factors for Continuous, Intermittent, and Spare status have a range from 0% to 100%. Since demand factors are a part of engineering properties, PowerStation uses the same factors for all configurations.



11.8.2 Rating Page In this page, you can specify the DC lumped load ratings and select percentages of motor loads and static loads. You can also display the kW loading (motor and static) for all loading categories.

Rating

kW Enter the total kW loading (motor and static) for the lumped load. Click on the kW/MW button to choose from either kW or MW units for entering and displaying data. PowerStation uses the following equation for the DC lumped load full load current: Full-Load Amp = kW*1,000 / V Rating in kW = MW *1,000,000 / V Rating in MW

V Enter the rated voltage of the DC lumped load in volts.

FLA The DC lumped load full load current is calculated and displayed here. When the full load current is changed, the rated power of the DC lumped load is recalculated.

Motor / Static Load Select the percent motor and static loading of the lumped load by shifting the slider position.

Loading This section is used to assign a percent loading to each one of the ten loading categories for this DC lumped load, i.e., each DC lumped load can be set to have a different operating loading level for each loading category. To edit the values of the percent loading, click on any one of the edit fields under the % Loading column. Note that you can select any of these loading categories when conducting DC load flow studies. To edit the loading category names, select Loading Category from the Project menu.



11.8.3 SC Page Within the SC page, specify the short-circuit multiplication factor, time constant and impedance, including resistance and inductance of the DC lumped load. You can view the calculated short-circuit current of the DC lumped load. Note that the data in this page are only related to the motor load of the DC lumped load.

SC Parameters

K Enter the short-circuit multiplication factor in percent of the FLA of the motor part of the lumped load. PowerStation uses this value to calculate the short-circuit current of the lumped load for a terminal bus fault. When you change the multiplication factor, the resistance, inductance and the short-circuit current contribution are recalculated. The multiplication factor defaults to 1000%.

R’d Enter the resistance of the lumped load short-circuit impedance in ohms. When you change the resistance value, the inductance, multiplication factor, and short-circuit current are recalculated.

Time Constant Enter the time constant of the lumped load in seconds. When you change the time constant value, the inductance is recalculated.

L’d Enter the inductance of the lumped load short-circuit impedance in henries. When you change the inductance value, the time constant is recalculated.

Isc The short-circuit current contribution of the motor part of the DC lumped load for a terminal bus fault is calculated and display here in amperes. If a lumped load is 100% static load, there will be no short-circuit contribution.









11.8.5 Remarks Page











Drawing/Diagram



Manufacturer


Purchase Date Enter the date of purchase for this element here, up to 8 alphanumeric characters.



11.8.6 Comment Page



DC Elements DC Elementary Diagram

11.9 DC Elementary Diagram The properties associated with DC elementary diagram loads of the electrical distribution system can be entered in this editor. The DC Elementary Diagram Editor contains five pages of information. • Info Page • Rating Page • Duty Cycle Page • Remarks Page • Comment Page

11.9.1 Info Page Within the Info page, specify the DC elementary diagram load ID, connected bus ID, In/Out of Service, Equipment FDR (feeder) Tag, Name, Description, Data Type, load Priority.

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC elementary diagram load. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of DC elementary diagram loads increases. The default ID (dcElem) for DC elementary diagrams can be changed from the Defaults menu in the menu bar or from the Project View.

Bus This is the ID of the connecting bus for the DC elementary diagram load. If the terminal is not connected to any bus, a blank entry will be shown for the bus ID. To connect or reconnect a DC elementary diagram load to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminal of the elementary diagram to


DC Elements DC Elementary Diagram the DC buses that reside in the same view where it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to a bus that resides in the Dumpster. If a DC elementary diagram load is connected to a bus through a number of protective devices, reconnection of the DC elementary diagram load to a new bus in this editor will reconnect the last existing protective device to the new bus, as shown below where DCED1 is reconnected from DCBus10 to DCBus4.

In/Out of Service Operating conditions of a DC elementary diagram load can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC elementary diagram load can be edited like an In Service DC elementary diagram load; however, an Out of Service DC elementary diagram load will not be included in any system studies. When Continuity Check is activated, an Out of Service DC elementary diagram load automatically becomes dimmed in the one-line diagram. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a branch to be In Service for the Base Data and Out of Service in Revision Data.

Equipment





Priority Select the load priority of this elementary diagram load from the list box. This field can be used for load priority, operating priority, load shedding priority, etc. Ten different priorities are provided to select from. Priority names can be changed from the Project menu under Settings and Load Priority.



11.9.2 Rating Page In this page, you can specify the DC elementary diagram load ratings. The DC elementary diagram load loading for all loading categories is displayed.

Rating

kW Enter the rating (total of all elements within this elementary diagram) in kW. Click on the kW/MW button to choose either kW or MW units for entering and displaying data. PowerStation uses the following equation for the full load current of the DC elementary diagram load: Full Load Amp = kW*1,000 / V Rating in kW = MW *1,000,000 / V Rating in MW

V Enter the rated voltage of the DC elementary diagram load in volts.

FLA The full load current of the DC elementary diagram load is calculated and displayed here in amperes. When the full load current is changed, the rated power of the DC elementary diagram load is recalculated.

Loading This section is used to assign a percent loading to each one of the ten loading categories for this DC elementary diagram load, i.e., each DC elementary diagram load can be set to have a different operating loading level for each loading category. To edit the values of the percent loading, click on any one of the edit fields under the % Loading column. Note that you can select any of these loading categories when conducting DC load flow studies. To edit the loading category names, select Loading Category from the Project menu.









11.9.4 Remarks Page











Drawing/Diagram



Manufacturer





11.9.5 Comment Page



DC Elements DC Composite Motor

11.10 DC Composite Motor Composite motors are used as a tool to group motors and loads in the system. The elements that you can include inside a DC composite motor are: • DC Motors • DC Static Loads • DC Lumped Loads • DC Elementary Diagram Loads • DC Circuit Breakers • DC Single-Throw Switches • DC Fuses • DC Composite Motors The number of levels that you can nest composite motors inside composite motors is unlimited. Other than the limitation on the types of elements that you can include inside a composite motor, the user interface characteristics of composite motors are the same as the one-line diagram.

To open the DC Composite Motor Editor, open the composite motor by double-clicking on it. Double-click again on the blank background of the window.


DC Elements DC Circuit Breaker

11.11 DC Circuit Breaker The properties associated with DC circuit breakers of the electrical power system can be entered in this editor. DC circuit breaker protection devices are available for a full range of voltages. The DC Circuit Breaker Editor contains three pages of information. • Info Page • Remarks Page • Comment Page

11.11.1 Info Page Within the Info page, specify the ID, connected bus / load, In/Out of Service, Ratings, Equipment FDR (feeder) Tag, Name, Description, and Configuration Status of the DC circuit breaker.



Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC circuit breaker. The assigned IDs consist of the default ID plus an integer, starting with the number one and increases as the number of CBs increases. The default ID (dcCB) for DC circuit breakers can be changed from the Defaults menu in the menu bar or from the Project View.

To & From Bus IDs for the connecting buses of a DC circuit breaker are designated as From and To buses. If a terminal of a breaker (From or To) is not connected to any bus, a blank entry will be shown for bus ID. If a terminal of a DC breaker is connected to a branch, directly or indirectly, the ID of the branch will be displayed for the terminal connection. To connect or reconnect a DC breaker to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminals of the circuit breaker to other dc elements that reside in the same view where the it resides or can connect to elements that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to elements that reside in the Dumpster. If a DC breaker is connected to a bus through a number of other protective devices, reconnection of the DC breaker to a new bus from this editor will reconnect the last existing protective device to the new bus, as shown below where DCCB1 is reconnected from DCBus10 to DCBus4.


In/Out of Service Operating conditions of a DC circuit breaker can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC circuit breaker can be edited like an In Service DC circuit breaker; however, an Out of Service DC circuit breaker will not be included in any system studies. When Continuity Check is activated, an Out of Service DC circuit breaker automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service DC circuit breaker will also be de-energized and become dimmed.


DC Elements DC Circuit Breaker Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a DC circuit breaker to be In Service for the Base Data and Out of Service in Revision Data.

Configuration You can change the status of a DC circuit breaker (for the selected configuration) by clicking on the Close or Open options. Once a configuration status is selected for a one-line presentation, any subsequent manipulation of the status of an element (circuit breaker, fuse, motor, or static load) will be saved under the specified configuration. Note that status is not a part of the engineering properties. For this reason, the name of the configuration status is shown above the status of the DC circuit breaker to indicate that this is the breaker status under the specific configuration, i.e., you can have different operating status under different configurations. In the following example, the status of a DC circuit breaker is shown as closed under Normal configuration and open under Open Tie configuration.

Ratings

Rated V Enter the rated voltage of the DC circuit breaker in volts or select the rating from the list box.

Continuous Amp Enter the continuous current rating of the DC circuit breaker in amperes or select the rating from the list box.

Max. V Enter the rated maximum voltage of the DC voltage circuit breaker in volts or select the rating from the list box.

SC kA Enter the rated short-circuit current at the rated maximum voltage in kA or select the rating from the list box. This value is used in DC short-circuit studies to compare against the calculated short-circuit duty of the connected bus.



OnLine Status The data here are associated with the online (real-time) operation of PowerStation (PSMS).

Scanned Status The scanned status (open or closed) of the switching device is displayed.

Equipment




11.11.2 Remarks Page


DC Elements DC Circuit Breaker User-Defined Info These fields allow you to keep track of extra data associated with this component. The names of the User-Defined (UD) fields can be changed from the Settings option in the Project menu in the Menu bar.








Drawing/Diagram



Manufacturer




DC Elements DC Circuit Breaker 11.11.3 Comment Page



DC Elements DC Fuse

11.12 DC Fuse The properties associated with DC fuses of the electrical distribution system can be entered in this editor. DC fuse protection devices are available for a full range of voltages. The DC Fuse Editor contains four pages of information. • Info Page • Rating Page • Remarks Page • Comment Page

11.12.1 Info Page Within the Info page, specify the DC fuse ID, connected bus ID, In/Out of Service, Equipment FDR (feeder) Tag, Name and Description, Configuration Status, and view the DC fuse online status.

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC fuse. The assigned IDs consist of the default ID plus an integer, which starts with the number one and increases as the number of DC fuses increases. The default ID (dcFuse) for DC fuses can be changed from the Defaults menu in the menu bar or from the Project View.

From & To Bus IDs for the connecting buses of a DC fuse are designated as From and To buses. If a terminal of a DC fuse (From or To) is not connected to any bus, a blank entry will be shown for bus ID. If a terminal of a DC fuse is connected to a branch, directly or indirectly, the ID of the branch will be displayed for the terminal connection. To connect or reconnect a DC fuse to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminals of the fuse to other dc elements that reside in the same view where the it resides or


DC Elements DC Fuse can connect to elements that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to elements that reside in the Dumpster. If a DC fuse is connected to a bus through a number of protective devices, reconnection of the DC fuse to a new bus from this editor will reconnect the last existing protective device to the new bus, as shown below where DCFuse1 is reconnected from DCBus10 to DCBus4.


In/Out of Service Operating conditions of a DC fuse can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC fuse can be edited like an In Service DC fuse; however, an Out of Service DC fuse will not be included in any system studies. When Continuity Check is activated, an Out of Service DC fuse automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service DC fuse will also be de-energized and become dimmed. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a DC fuse to be In Service for the Base Data and Out of Service in Revision Data.

Configuration You can change the status of a DC fuse (for the selected configuration) by clicking on the Close or Open options. Once a configuration status is selected for a one-line presentation, any subsequent manipulation of the status of an element (circuit breaker, fuse, motor, or static load) will be saved under the specified configuration. Note that status is not a part of the engineering properties. For this reason, the name of the configuration status is shown above the status of the fuse to indicate that this is the fuse status under the specific configuration, i.e., you can have different operating status under different configurations. In the following example, status of a fuse is shown as closed under Normal configuration and open under Open Tie configuration.


DC Elements DC Fuse

OnLine Status The data here are associated with the online (real-time) operation of PowerStation (PSMS).


Equipment




11.12.2 Rating Page


DC Elements DC Fuse Ratings

Rated V Enter the rated voltage of the DC fuse in volts or select the rating from the list box.

Continuous Amp Enter the continuous current rating of the DC fuse in amperes or select the rating from the list box.

Interrupting kA Enter the rated interrupting capability of the DC fuse in kA or select the rating from the list box. This value is used in DC short-circuit studies.






DC Elements DC Fuse UD Field 3 (Next Maint.) This is an alphanumeric field with the default name Next Maint. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.





Drawing/Diagram



Manufacturer




DC Elements DC Fuse

11.12.4 Comment Page



DC Elements DC Single-Throw Switch

11.13 DC Single-Throw Switch The properties associated with DC single-throw switch of the electrical distribution system can be entered in this editor. The Single-Throw Switch Editor contains three pages of information. • Info Page • Remarks Page • Comment Page

11.13.1 Info Page Within the Info page, specify the DC single-throw switch ID, connected bus ID, In/Out of Service, Ratings, Equipment FDR (feeder) Tag, Name and Description, Configuration Status, and view the online status of the DC single-throw switch.



Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC switch. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of DC single-throw switches increases. The default ID (dcS) for DC single-throw switches can be changed from the Defaults menu in the menu bar or from the Project View.

To & From Bus IDs for the connecting buses of a DC single-throw switch are designated as From and To buses. If a terminal of a switch (From or To) is not connected to any bus, a blank entry will be shown for bus ID. If a terminal of a switch is connected to a branch (directly or indirectly), the ID of the branch will be displayed for the terminal connection. To connect or reconnect a switch to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminals of the switch to other dc elements that reside in the same view where the it resides or can connect to elements that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to elements that reside in the Dumpster. If a DC single-throw switch is connected to a bus through a number of other protective devices, reconnection of the switch to a new bus from this editor will reconnect the last existing protective device to the new bus, as shown below where DCSPST1 is reconnected from DCBus10 to DCBus4.


In/Out of Service The operating conditions of a DC single-throw switch can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC single-throw switch can be edited like an In Service DC single-throw switch; however, an Out of Service DC single-throw switch will not be included in any system studies. When Continuity Check is activated, an Out of Service DC single-throw switch automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service DC single-throw switch will also be de-energized and become dimmed.


DC Elements DC Single-Throw Switch Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a DC single-throw switch to be In Service for the Base Data and Out of Service in Revision Data.

Configuration You can change the status of a DC single-throw switch (for the selected configuration) by clicking on the Closed or Open options. Once a configuration status is selected for a one-line presentation, any subsequent manipulation of the status of an element (switch, fuse, motor, or static load) will be saved under the specified configuration. Note that status is not a part of the engineering properties. For this reason, the name of the configuration status is shown above the status of the switch to indicate that this is the switch status under the specific configuration, i.e., you can have different operating status under different configurations. In the following example, status of a DC single-throw switch is shown as closed under Normal configuration and open under Open Tie configuration.

Rating

V Enter the rated voltage of the DC single-throw switch in volts or select the rating from the list box.

Cont. Amp Enter the rated continuous current of the DC single-throw switch in amperes or select the rating from the list box.

BIL Enter the basic impulse levels in kV. This value is not used in any calculations at this point.

Momentary Enter the rated short-circuit withstand capability of the DC single-throw switch in kA or select the rating from the list box. This value represents the momentary capability (making or bracing) of the switch and is used in DC short-circuit studies to compare against the calculated fault duty of the connected bus.

Equipment




DC Elements DC Single-Throw Switch Description Enter equipment description, up to 100 alphanumeric characters.

OnLine Data The data here are associated with the online (real-time) operation of PowerStation (PSMS).


Pin Click on this button to pin the switching device to either closed or open status. This option is provided to overwrite the actual status received from the real-time system.

Control Click on this button to control the status (open or closed) of the device. PSMS will request confirmation.








UD Field 4 (Tests Req.) This is an alphanumeric field with the default name Tests Req. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters. UD Field A5 This is an alphanumeric field with the default name UD Field A5. You can change the name of this field and enter any extra data for this element here, up to 12 alphanumeric characters.



Drawing/Diagram



Manufacturer




DC Elements DC Single-Throw Switch 11.13.3 Comment Page



DC Elements DC Double-Throw Switch

11.14 DC Double-Throw Switch The properties associated with DC double-throw switches of the electrical distribution system can be entered in this editor. The Double-Throw Switch Editor contains three pages of information. • Info Page • Remarks Page • Comment Page

11.14.1 Info Page Within the Info page, specify the DC double-throw switch ID, connected bus ID, In/Out of Service, Ratings, Equipment FDR (feeder) Tag, Name and Description, Configuration Status, and view the online status of the DC double-throw switch.


DC Elements DC Double-Throw Switch

Info

ID Enter a unique alphanumeric ID with a maximum of 25 characters. PowerStation automatically assigns a unique ID to each DC double-throw switch. The assigned IDs consist of the default ID plus an integer, starting with the number one and increasing as the number of DC double-throw switches increases. The default ID (dc2S) for DC double-throw switches can be changed from the Defaults menu in the menu bar or from the Project View.

From, Pos. A, and Pos. B Bus IDs for the connecting buses of a DC double-throw switch are designated as From, Pos. A, and Pos. B buses. If a terminal of a switch (From, Pos. A, or Pos. B) is not connected to any bus, a blank entry will be shown for bus ID. If a terminal of a switch is connected to a branch (directly or indirectly), the ID of the branch will be displayed for the terminal connection. To connect or reconnect a switch to a bus, select a bus from the list box. The one-line diagram will be updated to show the new connection after you click on OK. Note that you can connect the terminals of the double-throw switch to DC buses that reside in the same view where the it resides or can connect to buses that reside in other views by connecting the external and internal pins of the composite networks. You cannot connect to buses that reside in the Dumpster. If a DC double-throw switch is connected to a bus through a number of other protective devices, reconnection of the switch to a new bus from this editor will reconnect the last existing protective device to the new bus, as shown below where DCSPDT1 is reconnected from DCBus10 to DCBus4.

Unlike a single-throw switch, the double-throw switch has to be connected to a bus before being connected to loads and branch elements. Next to the From, Pos. A, and Pos. B bus IDs, PowerStation displays the nominal V of the buses for your convenience.

In/Out of Service The operating conditions of a DC double-throw switch can be selected by choosing either the In Service or Out of Service option. The properties of an Out of Service DC double-throw switch can be edited like an In Service DC double-throw switch; however, an Out of Service DC double-throw switch will not be included in any system studies. When Continuity Check is activated, an Out of Service DC double-throw


DC Elements DC Double-Throw Switch switch automatically becomes dimmed in the one-line diagram. All the loads and branches energized solely through an Out of Service DC double-throw switch will also be de-energized and become dimmed. Note that the In/Out of Service option is an engineering property and is independent of the configuration status. Therefore, you can set a DC double-throw switch to be In Service for the Base Data and Out of Service in Revision Data.

Configuration You can change the status of a DC double-throw switch (for the selected configuration) by clicking on the Position A and Position B options. Once a configuration status is selected for a one-line presentation, any subsequent manipulation of the status of an element (switch, fuse, motor, or static load) will be saved under the specified configuration. Note that status is not a part of the engineering properties. For this reason, the name of the configuration status is shown above the status of the switch to indicate that this is the switch status under the specific configuration, i.e., you can have different operating status under different configurations. In the following example, status of a switch is shown to be in position A under Configuration Status Switch A and position B under Configuration Status Switch B.

Rating

V Enter the rated voltage of the DC double-throw switch in V or select the rating from the list box.

Cont. Amp Enter the rated continuous current of the DC double-throw switch in amperes or select the rating from the list box.

BIL Enter the basic impulse levels in kV.

Momentary Enter the rated breaking current of the DC double-throw switch in kA or select the rating from the list box.

Equipment




DC Elements DC Double-Throw Switch Description Enter equipment description, up to 100 alphanumeric characters.

OnLine Data The data here are associated with the online (real-time) operation of PowerStation (PSMS).


Pin Click on this button to pin the switching device to either closed or open status. This option is provided to overwrite the actual status received from the real-time system.

Control Click on this button to control the status (open or closed) of the device. PSMS will request confirmation.



DC Elements DC Double-Throw Switch User-Defined Info These fields allow you to keep track of extra data associated with this component. The names of the User-Defined (UD) fields can be changed from the Settings option in the Project menu in the Menu bar.








Drawing/Diagram



Manufacturer




DC Elements DC Double-Throw Switch 11.14.3 Comment Page



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